There are "four priniciples" of osteopathic medicine. They are:
1. The human being is a dynamic unit of function.
2. The body possesses self-regulatory mechanisms that are self-healing in nature.
3. Structure and function are interrelated at all levels.
4. Rational treatment is based on these principles.
As for Gevitz, check the SDN bookstore for The D.O.'s: Osteopathic Medicine in America.